Ring binder



FIG. 1 is a perspective view of a ring binder showing my new design with the rings in the closed position;

FIG. 2 is a view similar to FIG. 1 with the rings in the open position;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a left end elevational view thereof with the rings in the closed position, the right end being a mirror image thereof.

The broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a ring binder, as shown and described. 